goodbye

used when you are leaving somebody or when somebody else is leavingGoodbye! It was great to meet you.She didn't even say goodbye to her mother.Say goodbye to Mary for me.We waved them goodbye.We've already said our goodbyes.Kiss me goodbye!(figurative)Take out our service contract and say goodbye to costly repair bills.comparebye

Word Originlate 16th cent.: contraction of God be with you!, with good substituted on the pattern of phrases such as good morning.Idioms